2- Taxonomy of the Order Solanales

2.1- Family Convolvulaceae (morning glory and sweet potato)+ OverviewConvolvulaceae, known commonly as the bindweed or morning gloryfamily, is a family of about 12 tribes, 60 genera and more than 1,650 species of mostly herbaceousvines, but also trees, shrubs and herbs. Convolvulaceae can be recognized by their funnel-shaped, radially symmetrical corolla; the floral formula for the family has five sepals, five fused petals, five epipetalous stamens (stamens fused to the petals), and a two-part syncarpous and superior gynoecium. The stems of these plants are usually winding, hence their Latin name (from convolvere, "to wind").+ Tribes of the FamilyConvolvulaceae Recent molecular analysis has largely reflected this except in some details, and 12 tribes are here recognised: 1- Tribe Aniseieae Tribe Aniseieae has 4 genera with 7 species, in tropical America. 2- Tribe Cardiochlamyeae Tribe Cardiochlamyeae has 6 genera and 21 species, in Madagascar, tropical Asia and Central Australia. 3- Tribe Convolvuleae Tribe Convolvuleae has 4 genera and 375 species, in temperate and tropical regions. 4- Tribe Cresseae Tribe Cresseae has 8 genera with 215 species, widespread. 5- Tribe Cuscuteae Tribe Cuscuteae has 1 genus with over 200 species, widespread. 6- Tribe Dichondreae Tribe Dichondreae has 4 genera of which one is widespread, one is from Yemen to S. Africa, one is confined to Ethiopia, and one in Mexico, with 20 species. 7- Tribe Erycibeae Tribe Erycibeae has 1 genus and about 75 species, in tropical Asia to Queensland. 8- Tribe Humbertieae The tribe Humbertieae is monotypic, from Madagascar. 9- Tribe Ipomoeeae Tribe Ipomoeeae has 10 genera and about 755 species, in pantropical areas. 10- Tribe Maripeae Tribe Maripeae has 3 (or 4) genera and 36 (or 37) species, in tropical America. 11- Tribe Merremieae Tribe Merremieae has 8 genera with 120 or more species, in pantropical areas. 12- Tribe Poraneae Tribe Poraneae has 4 (or 7) genera and 32 (or 53) species, in pantropical areas. Source: http://convolvulaceae.myspecies.info/node/9#overlay-context

2.2- Family Hydroleaceae+ OverviewHydroleaceae is a family of the order Solanales. This family has a sole genus: Hydrolea.+ GenusHydrolea (false fiddleleaf) is the only genus of the family Hydroleaceae of the order Solanales.

2.4- Family Solanaceae (nightshadefamily)+ OverviewThe Solanaceae, or nightshades, are an economically important family of flowering plants. The family ranges from annual and perennial herbs to vines, lianas, epiphytes, shrubs, and trees, and includes a number of important agricultural crops, medicinal plants, spices, weeds, and ornamentals. Many members of the family contain potent alkaloids, and some are highly toxic, but many cultures eat nightshades, in some cases as staple foods. The family belongs to the order Solanales, in the asterid group dicotyledons (Magnoliopsida). The Solanaceae consists of about 98 genera and some 2,700 species, with a great diversity of habitats, morphology and ecology. The family has a worldwide distribution, being present on all continents except Antarctica. The greatest diversity in species is found in South America and Central America. The Solanaceae include a number of commonly collected or cultivated species. The most economically important genus of the family is Solanum, which contains the potato (Solanum tuberosum, in fact, another common name of the family is the "potato family"), the tomato (Solanum lycopersicum), and the eggplant or aubergine (Solanum melongena). Another important genus, Capsicum, produces both chili peppers and bell peppers.+ Subfamilies 1- Cestroideae 2- Goetzeoideae 3- Nicotianoideae 4- Petunioideae 5- Schizanthoideae 6- Schwenckioideae 7- Solanoideae.